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Box girder hogging moment prestress tension protection device

A protection device and negative bending moment technology, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as hidden safety hazards, losses, personnel accidents, etc., and achieve increased load-bearing capacity, increased stability, and increased contact area. Effect

Active Publication Date: 2021-11-05
CIVIL ENG OF CHINA CONSTR SECOND ENG BURESU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When installing the box girder and setting the tensioning device in this engineering process, due to the huge tension force, if there is an error at both ends of the steel cable, it will cause great losses. On the premise of testing and confirming the safety, the tension force can be gradually increased to pull the steel cable to the predetermined tension. In the process again, it is not only difficult to ensure the safety protection of the relevant personnel close by, but also a lot of time is wasted. The connection of the cable still has a large potential safety hazard, and a slight improper operation will cause the cable to fall off and fly, and accidents will occur to personnel. proposed question

Method used

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  • Box girder hogging moment prestress tension protection device
  • Box girder hogging moment prestress tension protection device
  • Box girder hogging moment prestress tension protection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: Negative bending moment tension member 1 includes a buffer base plate 101, a central column 102, a predetermined height adjustment seat 103, a positioning hole 104, a positioning rod 105, a limit ring 106, a steel cable twist ring 107, a tension guide rail 108 and The center column 102 is fixedly connected to the middle position of the upper surface of the balance groove 109 and the buffer base plate 101 , and a predetermined height adjustment seat 103 is provided slidingly on the side of the center column 102 .

[0050] The side of the central column 102 is provided with a positioning hole 104, and a positioning rod 105 is provided through the positioning hole 104. The side of the positioning rod 105 is fixedly connected to the limit ring 106, and the side of the center column 102 top is fixedly connected to the limit ring 106, and the predetermined height is adjusted. The side of the seat 103 is fixedly connected with a steel cable hinge 107, and the side...

Embodiment 2

[0053] Embodiment 2: The prestress adjusting part 2 comprises a stretching cart 201, a balance plate 202, a pressing plate 203, a sliding block 204, a pressing wheel 205 and a limit strip 206, and the stretching cart 201 is arranged above the buffer base plate 101, and is connected with The tension guide rail 108 cooperates with the layout of the tension steel cable 6 .

[0054] The side of the tensioning trolley 201 is fixedly connected with a balance plate 202, and the side of the tensioning trolley 201 close to the central column 102 is fixedly connected with a pressing plate 203, and the side of the tensioning trolley 201 is fixedly connected with a sliding block 204 adapted to the balance groove 109 , the balance plate 202 is fixedly connected to the side of the sliding block 204, and the balance plate 202 extends into the inner side of the balance groove 109, the upper surface of the balance plate 202 is fixedly connected with the pressing wheel 205, and the inner wall of...

Embodiment 3

[0057] Embodiment 3: Segmental tensioning fall-off protection piece 3 includes connecting plate 301, roller 302, connecting cable 303 and counterweight plate 304, the lower surface of connecting plate 301 is fixedly connected with roller 302, and the bottom of roller 302 is provided with connecting cable 303 The end of the connecting cable 303 away from the roller 302 is fixedly connected with a weight plate 304 .

[0058]The connecting plate 301 is vertically arranged with the tension steel cable 6, the lower surface of the connecting plate 301 is fixedly connected with a fixed plate 7, and the two fixed plates 7 are fixedly connected with a rotating shaft 8, and the bearing of the roller 302 is connected to the side of the rotating shaft 8, and the roller 302 A limit rolling groove 9 compatible with the tensioning steel cable 6 is opened on the side of the side, and the roller 302 is clamped with the tensioning steel cable 6 through the limit rolling groove 9 .

[0059] The ...

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Abstract

The invention discloses a box girder hogging moment prestress tension protection device, and relates to the field of building safety protection. The box girder hogging moment prestress tensioning protection device comprises a hogging moment tensioning piece, a prestress adjusting piece and a section type tensioning falling protection piece, the upper surface of the hogging moment tensioning piece is provided with the prestress adjusting piece, and the section type tensioning falling protection piece is arranged between the hogging moment tensioning piece and the prestress adjusting piece in a sliding mode. According to the box girder hogging moment prestress tensioning protection device, a tensioning steel cable is arranged through the hogging moment tensioning piece, tensioning is carried out by controlling a tensioning trolley to move in a tensioning guide rail, personnel cannot be exposed in the tensioning range in the whole tensioning process, the personnel can be effectively prevented from being hurt by tensioning rebound, the section type tensioning falling protection part is arranged on the tensioning steel cable, the counter weight of the tensioning steel cable is increased by arranging the section type tensioning falling protection part on the tensioning steel cable in a section mode, and the springing range of the tensioning steel cable is shortened when the steel cable falls off and rebounds.

Description

technical field [0001] The invention relates to the technical field of building safety protection, in particular to a negative bending moment prestress tension protection device for a box girder. Background technique [0002] A bridge generally refers to a building erected on a river, a lake or between two highlands for the passage of pedestrians and vehicles. Generally, a lot of box girder structures are used in the construction of a bridge. While ensuring the stability of the bridge structure, the bridge itself should be minimized. Weight, currently in the process of bridge construction, due to the limited length of the box girder, the formation of the bridge often needs to be formed by splicing multiple box girders. Negative moment tension engineering. [0003] In the prior art, when tensioning the ends of the two box girders with negative bending moment, it is generally necessary to first pass the steel strands through the tension grooves at the bottom of the two box gi...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D2/04E01D101/28
CPCE01D21/00E01D2/04E01D2101/28Y02A30/30
Inventor 刘驷达温向峰刘龙军张俊华刘凤鸽
Owner CIVIL ENG OF CHINA CONSTR SECOND ENG BURESU
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